Fluid-pressure pump



J. W. GURLEY FLUID PRESSURE PUMP Jan; 1, 1 929.

um. .MFN NN NEW Patented Jan. 1, 1929.

UNITED STATES PATENT OFFICE.

JOHN W. GURLEY, F INDIANAPOLIS, INDIANA, ASSIGNOR OF ONE-HALF TO HAROLD TAYLOR, OF INDIANAPOLIS, INDIANA. i

FLUID-PRESSURE PUMP.

Application filed November The object of my invention is to provide a fluid pressure pump or motor for air and other fluids for different purposes by which I obtain a continuous uninterrupted flow of fluid at high speed and large volume by a comparatively small and compact pumpe-f simple and economical construction and maintenance, as will further appear. y

In the accompanying drawing, forming part hereof, Figure 1 is a vertical sectional view of my improved pump taken on the dotted line 1-1 in Fig. 2; Fig. 2,

view on the dotted line 2 2 in Fig. 1 Fig. 3, a plan of the connecting rod assembly 5 Fig. 4, a perspective of one of the check valves employed in connection with the inlet and outlet of the cylinders; Fig. 5 an elevation in partial section of one of the pistons showing the ports therethrough; Fig. 6 a perspective of the check or clack valve applied to the pistons of the pump; and-Fig. 7 an 'elevation of an oil supply indicator which I employ.

In said drawings the portions marked 5 indicate the cranl-case embodying shoulders, 6, between which I seat the intake and discharge cylinders 7, 8, securing the same to the shoulders by bolts 9. In the crank-case I mount a balance-wheeh 10, preferably formed integrally with a shaft, 11, or they may be separate structures. Within the wheel collars 15, 16, are inserted and between which ball bearings, 17, are positioned. Interposed between the inner face of the wheel 1() and wall 5 of the crank-case are the connecting-rods 20, 21, for the respective cylinders 7, 8, the lower end of the rod 21 constituting a hub, 22, having an offset portion, 23, into which I fit the lower end, 24, of rod 20, and secure said latter rod to the hub 22 by a wrist-pin, 25, the ends of the connecting rods being thus eccentrically mounted in relation to the wheel 10. The balance wheel, rods and associated parts are enclosed within the vcrz'lnlr-case by a suitable cap, as 26, 'preferably terminating in a cellar, 27, through which the shaft eX- tends, said cap being maintained in position and oil sealed bythe adjusting nut, 2S, and is further secured to the Crank case (and to an oil reservoir to be described) bythe bolts, 3.0, as shown in Fig. 2, the periphery of the balance wheel 10 beingspaced from that of the cranlrcase to form an oil and' compression chamber therein; and Within said cap 26 I inlsert collars 26 and 27 between which ball a vertical sectional a, 1927. serial No. 230,862.

hearings 28 are positioned, thus assuring light runningof shaft 11.

In cylinder 7 I connect a piston, 31, to the connecting rod 20 by a pin, 32, the piston being provided with ports, 33, running longitudinally therethrough, and in cylinder 8 I connect rod 21 to a piston, 35, by a pin, 36, said latter piston also having longitudinally ar-V to pressure, said valve being secured to the inlet by screws, 42. To the discharge outlet 8 of cylinder 8 Va similar valve 4() is secured by screws 42, except that it occupiesla reverse position from that shown in the. inlet 7 and as illustrated'iin Fig. 4, so that its `tongue 41 will be actuated in an opposite direction, as will further appear. I4 connect to the under side of piston 7 a valve substantially as that shown in Fig. 6, which comprises a circular metallic plate, 44, having a slot, 45, therein'through which connecting rod 20 will jmove while reciprocating'. This valve 44 ris preferably milled to receive a tongue 46 of suitable material the plate 44 having holes 47 therethrough, and said tongue being secured at 48 to the plate 44 so that when actuated the ends of the tongue will play to and from cont-act with said plate somewhat similarly to a clack-valve and for purposes of distinction I will so term said valve. A substantially similar valve 44 is secured by screws to the upper end of piston 35 but in reverse position to the valve secured to the lower end of piston 31, these valves, pistous and parts associated therewith operat` ing in the following manner. v

Upon vrotation of |the wheel 101 reciprocatory motion of the rods 20, 21, is established', bothrods and their pistonssimultaneously traveling in the same direction, and, as piston 31 starts downwardly away from the inlet 7", a vacuum is produced adjacent the. head thereof which causes the valve-tongue 41 .to move downwardly and thus open thefvalve seat, and at thesarne moment the pressure of fluid in the crankcase 5 -under the claclrvalve 44 closes this latter valve and prevents air or other iiuid from flowing upwardly through piston 31; in other words, the vacuum in the inlet and the pressure in the crankcase positively seal the valve plates. As stated, piston 35 is movingdownwardly with piston 31, but the valve parts associated with piston 35 act reversely from those cooperating with piston 31, that is, when piston 35 moves downwardly, with piston 31, valve 41 will close and the clack-valve at the upper end of piston 35 will open until a period where the compression reaches a point greater than pressure of delivery when the vvalve-4l opens to expel the compression; and as piston 3l starts upwardly the fluid pressure at the upper side of said piston will-cause valve tongue 41 to close, and the tongue 46 lof the clackvalve 44 to open, which valve actions permit the iiuid which has been drawn into cylinder 7 at the downward stroke of piston 31 to pass from the upper end ofthe piston through the ports 33 therein and into the crank case, which latter constitutes a conduit or passageway for the fluid under compression. to pass up through the ports in piston 35 and close Clackvalve tongue 46, while at the same moment opening tongue41 of valve 40, with the result that the rapid reciprocation of the pistons establishes a continuous uninterrupted flow of fluid through the inlet 7 and into crankcase 5 under increasing high compression and discharging through outlet 8, such high compression being assured by the Very limited ,space existing between the crank-case, connecting rods and inner face of the balance wheel, as clearly shown in Fig. 2, wherein fluid pressure is being quicklyand efficiently established to a high degree. .It will be understood that as pistons 31 and 35 are traveling outwardly the valve tongue 41 in cylinder 7 and the valve tongue 46 on piston 35 are closed, thus raising the pressure at the upper end of cylinder 7 and upon valve tongue 46 0n the under side of piston 31, thereby forcing the pressure into the crank-case, and at this moment in the operation said valve 46 on'piston 35 being closed, said piston 35 is creating a vacuum which assists the action of piston 31 in cylinder 7, and which asseniblage and operation of the parts described makes both cylinders double acting', and, being actuated in a compression `case ot limited area, as indicated in Fig. 2, a continuous uninterrupted compression and flow of the fluid is accomplished. It will be understood th at my improvement can also be converted into a two-stage compressor by removing valve 40 from cylinder 7, in which situation, as pistons 31 and 35 are on the outward stroke, and two diameter spacesl having een created in the lower portions of the cylinders, the pistons lin their downward stroke to the last point of compression increase the Vpressure in the crank-case, due 'to its limited area, to practi- `55 or otherwise.

cally two diameters of volume, which pressure will in turn open the valve on piston 35, when the volume contained in the lower portions o the cylinders will have been compressed and forced into the cylinder 8 at the top ot' piston 35, so that on the upward stroke of piston 35 the cylinder portion containing its upper end has twice the contents of compressed lair that it would have if receiving its supply from the atmosphere. I have illustrated my improvement as preferably embodying radially disposed pistons and complementary parts, but do not desire to be understood as limiting myself to suchvspeciiic construction as modifications in details may be employed with the necessary parts assembled somewhat differently though functioning in a similar manner to attain the same r sults.

In an apparatus of the character disclosed it is necessary to constantly and effectively lubricate the actuating parts, and to accomplish this I combine therewith a lubricating system of any appropriate character, and a satisfactory equipment -for the purpose may be constructed and arranged in substantially the following manner. As indicated, the crank-case 5 is secured to an oil reservoir, 50, by screws, 30, into which reservoir oil is supplied through an inlet 51. A passage, 52, is provided through a wall of the reservoir and extends upwardly therethrough, and to which passage a-pipe 53 is connected, the vertical portion of the passage having a suitable valve therein for controlling the iow of oil, and in practice I have found that a spring-controlled ball valve, as 54,` Fig. 2, is

satisfactory. Pipe 53 extends to the upper end of cylinder 7, and is connected to its intake 7 by a coupling, 55, having an orifice, 56, therethrough, which preferably leads to a glass tube, 57, in which the lubricant may be inspected, thc tube in turn connnunicating with an orifice, 58, in said intake 7 and in said orifice suitable material, 59, is inserted for trapping dust particles and the like contained in the lubricant and thus filtering the latter. In the coupling 55 a needle-valve, 60, is provided, the head, 61, of which may coniprise a dial or indicator (Fig. .7) so that the alve may be set in a predetermined position by bringing a character of the dial in line with a pointer, (i2, secured to the coupling scribed the reciprocating action of the pistons and vrotary action of the wheel 10 constantly draws oil from the reservoir up By the arrangement de-A the piston-rod connections, and into cylinder 35, to lubricate all of the interior parts,

while any undue surplus carried between the therein, a shaft supporting the wheel, a connecting-rod terminating in a hub mounted in the balance-wheel, a connecting-rod having its lower end mounted in saidhub, a wristpin connecting the rods, pistons at the outer ends of the rocs, cylinders in which said rods and pistons reciprocate, and check-valves in the cylinders for controlling the iiow of fluid through said cylinders and pistons.

2. In an apparatus of the cha -acter described, in combination, a crank-case, a balance-wheel in said case, a connecting-rod having a hub fittingin said wheel and in eccentric relation to the wheel, a connectingrod having its lower end mounted in the hub, anti-friction bearings between the hub and balance-wheel, pistons connected to the rods, and cylinders in which said pistons reciprecate.

3. ln an apparatus of the character described, in combination, a crank-case embodying intake and discharge cylinders, valves in the cylinders, pistons in said cylinders one of said pistons having a valve on its under side and the other of said pistons having a valve on its upper side said valves opening and closing in reverse directions, a balance wheel in the crank-case, a shaft upon which the wheel is mounted, a cover-plate enclosing thescase, rods coinrecting the wheel to the pistons, the crank-case constituting a fiuid compression chamber, and means for eccentrically connecting the rods to the wheel.

et. In an apparatus of the character described, in combination, a crank-case having radially disposed cylinders connected thereto, valves in said cylinders opening and chasing in opposite direi-tions, pistons in the cylinders, rods connected to the pistons, a balance wheel in the case a shaft in the crank-case for rotating the balance-wheel, and means connecting said rods in eccentric relation to the balance-'wheel wherebv when the rods and pistons are reciprocated the valve in one of the cylinders will be opened to permit the inflow of fluid through its valve and piston into and through said crank-case and which flow will open the valve in the other cylinder to establish a continuous flew of fluid through said cylinders.

5. In an apparat-us of the character descibed, in combination, a crank-case, a shaft extending into the case, a balance-wheel connected to the shaft, rods mounted in said wheel, said crank-case constituting a fluid pressure chamber, intake and discharge cylinders, pistons in the cylinders connected to and reciprocated by said rods, a clack-valve on theV under side of one of the pistons, a

elack-valve upon the upper end of the other` piston, said valves opening and Aclosing in opposite directions, and a valve in the disycharge cylinder cooperating with said clack valves for permitting continuous and uninterrupted inflow, compression and discharge of fluid through the cylinders and crank-case.

6. In an apparatus of the character described, in combination, a crank-case, a shaft nected to the shaft, said case constituting a compression chamber, rods actuated by said wheel, an intake cylinder, a discharge cylinder, said rods reciprocating through said cylinders, pistons connected to and actuated by said rods, a valve associated with the piston in said' intake cylinder, and a valve associated with the outlet of said discharge cylinder, whereby upon the reciprocation of said pistons a continuous and uninterrupted flow of fluid is drawn into said intake cylinder and through its valve and piston to be compressed in said crank-case and discharged at increased pressure through the'valve associated with said discharge cylinder.

7. ln an apparatus of the character described, in combination, a crank-case, a shaft therein, a balance-wheel on said shaft, connecting rods actuated by said wheel, intake and discharge cylinders, a piston in said intake cylinder', means for connecting one of said rods to said piston, a piston in the discharge cylinder', means for connecting one of said rods to the latter piston, a valve on the under side of said intake piston adapted to open in a dowmvai'd direction, and a valve on the opposite end of said discharge piston adapted to open in an upward direction, whereby the flow of fluid will be continuous from reception by the intake cylinder to its expulsion through the discharge cylinder.

in testimony whereof I affix my signature.

Jenn w. oURLnY.

lextending into the case, a balance-wheel conff'`` 

